Improvement in rotary engines



s Sheets-S11ee t 2. M. NORDMANN, Ir.

ROTARY-ENGINE.

No. 191,250. Patented May 29,1877.

7 a JO j aiby Wz'zn e M as. H Was eAfo ialmann -r N.PETEHS,PNOTO-UTHOGRAPNER, WASHINGTON. D C I MAX NORDMANN, JR, OF BOSTON,MASSACHUSETTS.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters Patent No. 191,250, dated May 29,1877; application filed April 11, 1877.

To all whom it may concern Be it known that I, Max N ORDMANN, Jr., ofBoston, of the county of Suffolk and State of Massachusetts, haveinvented a new and useful or Improved Rotative Engine; and do herebydeclare the same to be described in the following specification andrepresented in the accompanying drawings, of which- Figure 1 is an endview, Fig. 2 a side elevation, Fig. 3 a transverse section, and Fig. 4 alongitudinal section, of it.

As shown in the drawings, this engine is composed in part of a globularcase, A, provided with an induct, a, and an educt, b, arranged with andopening out of it, in manner as shown.

Within the said case are two pistons, B 0, whose curved peripheries fitto the inner surface of the case. The piston O has its hub c concentricwith and fastened to a solid shaft, D, arranged diametrically in thecase A, and projecting therefrom, in manner as shown in Fig. 4. Theother piston projects from a tu bular shaft, E, encompassing the shaft Dfrom the center of the case outward, and supported in a suitablestuffing-box. Each piston has a notch, c, in its outer edge. One of thepistons viz., that marked B-projects from its shaft E over and againstthe cylindrical hub c of the other,while the piston 0 extends from suchhub in a similar manner over and against the shaft E-that is, the pistonB laps on the hub 0 throughout its length, and the piston G in likemanner laps on that part of the shaft E which is within the case A.

Fig. 5 is a side view of the piston (J, and

- Fig. 6 is a side view of the piston B and its shaft E. Fig. 7 is anouter edge view of one of such pistons.

On the external ends of the shafts D and a E are fixed two notcheddisks, F G, each berested by the stop H, and it will he released fromthe stop and moved forward a short distance by the other piston incourse of its rotary movement, as this latter piston, in passing againstthe stop, will depress it out of engagement with the fellow piston, andwill advance until caught by the stop. While nassin g over the stop apiston not only forces the stop out of engagementwith the fellowpiston,but impels the latter forward until the stop may be thrown upward by itsspring into the notch of the said impelling-piston. On this latterpiston being arrested in its motion it becomes an abutment for theinduction steam to act against in order to move the released piston. Thesteam entering between the two pistons will move the released one anentire revolution within the case, the steam that may be in the case andbeen employed to move the stopped piston being forced into and throughthe educt b.

The neck of the case and the two notched disks F Gare encompassed byarotative head,

collar, or annulus, L, from which a crank, N, is projected. This annulusis to revolve on the neck, and it has extending through it transverselya slide-bolt, M, provided with a stud or projection, g, to take into thenotch of either disk. The slide-bolt extends back of the annulus orsleeve L, and has pivoted to it a pointed slide, h, which enters one oftwo parallel grooves, 13 It, made in and around an auxiliary cylindricalneck, I, projecting from the case A, and arranged as shown. Thesegrooves cross each other in the lower part of the said neck, asrepresented in Fig 8, which is an under-sideview of the neck.

By means of the notched disks F G and the bolt M the rotary head L willbe caused to revolve with, and will be revolved by, each piston, whileeach piston may be in revolution, the crossed grooves i k and thepointed slide or tripper h serving at the proper times to disengage thebolt-stud g from one notched disk and engage it'with the other, in orderthat the head or sleeve L may be revolved by the piston to be moved bythe steam orliquid.

The globular form ofthe case and correspondingly areal form of thepistons I prefer to a cylindrical case and rectangular or squarepistons, as they expose less surface of pistons to wear or to keeppacked.

I claim- QFFICE 1. A rotative engine, substantially as described,composed of the case A, with its induct or and educt b, the two notchedpistons B (3, their concentric shafts D E, and the stop H, and thespring I, all constructed and arranged essentially in manner and tooperate as set forth. I

2. The combination of the notched disks F G', rotary head or sleeve L,slide-bolt M, tripper h, and the crossed grooves i7; with the rotativeengine, substantially as described,

composed of the case A, with its induct a and educt b, the two notchedpistons B (J, their concentric shafts D E, and the stop H and spring I,all being constructed, arranged, and applied substantially in mannershown and described.

MAX NORDMANN, J B.

Witnesses:

R. H. EDDY, -J. R. SNOW.

